Optical fiber sensor in the field of perimeter security

With the development of science and technology, in many perimeter security monitoring technologies, optical fiber sensing technology stands out. In the field of security, it can almost realize all the functions of traditional sensors and provides an effective security guarantee for the security target. It has an absolute advantage compared with the traditional method in technical performance and practical application. It can detect various physical quantities such as displacement, vibration, pressure, temperature, speed, flow and so on. It has the advantages of high sensitivity, no electromagnetic radiation, large dynamic range, wide adaptation range and so on. It is the main direction of the development of security technology.

Optical fiber sensing technology

Perimeter security

Optical fiber sensor (FiberOpticalSensor) is a new type of sensor based on optical fiber developed in the middle of 1970s. It is the product of the rapid development of optical fiber and optical communication technology, which is essentially different from the sensor based on electricity. Optical fiber sensor is used as the carrier of sensitive information, and optical fiber is used as the medium for transmitting sensitive information. Therefore, it has the characteristics of optical fiber and optical measurement.

The principle of optical fiber sensor is that the optical characteristics (light intensity, phase, frequency, polarization state, mode field, etc.) of the optical fiber in the optical fiber are changed under the effect of external factors. These characteristics are detected by various means. Through complex operation and analysis, the quality of the external factors is finally realized. Quantitative analysis.

The characteristics of optical fiber sensor:

good electrical insulation performance

Strong ability to resist electromagnetic interference

Noninvasive

High sensitivity

It is easy to realize remote monitoring of the measured signal

Optical fiber sensors can measure displacement, speed, acceleration, liquid level, strain, pressure, flow, vibration, temperature, current, voltage, magnetic field and other physical quantities.